Actually, these are also a good way to get players into that state in the first place!

Transcript

GM: As you descend, the feeling of power increases.Luke: Come on, Luke, stay frosty. Yoda said it's just me.GM: The presence here is almost overpowering.Luke: Is there someone else in here?GM: A dark figure emerges.Luke: Vader!Darth Vader: {Annie} Well, well. A living Jedi. This can be remedied.Luke: Actually... I'm just in training. Don't mind me.GM: Vader approaches menacingly.Luke: Wait. Ha ha! Yoda is just testing me. This is a manifestation of my paranoia.Darth Vader: So, Yoda is training you.Luke: Okay, Luke, just ignore him and he'll go away. La la la!Darth Vader: Luke...Darth Vader: Starkiller.
{Luke ignites his laser sword}[SFX]: wmmm...Darth Vader: Of course, a Jedi. My son would never have been killed by some mere ruffian.[SFX]: wmmm...Luke: Ha! How could you possibly know this if you weren't my subconscious?Darth Vader: In that case you won't need to dodge this!
{Vader swings his sword}[SFX]:Whooom!!